Patents by Inventor Mitsuru Shiroshita

Mitsuru Shiroshita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for separating 2,6-diethylnaphthalene
    Patent number: 5300721
    Abstract: This invention provides a method for separating 2,6-diethylnaphthalene from a mixture of diethylnaphthalene isomers by contacting said mixture with zeolite producing the same powder X-ray diffraction pattern as faujasite and the method can efficiently separate 2,6-diethylnaphthalene from ethylation reaction products containing diethylnaphthalene isomers.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: April 5, 1994
    Assignee: Nippon Steel Chemical Co., Ltd.
    Inventors: Genki Takeuchi, Kazuyoshi Kariu, Mitsuru Shiroshita